Rotary cutter-head



. in all cases it must extend down suii- UNIrED sTATEs PATENT OFFICE. N

ROTARY cU'r'rEBfHEAD..

Specification` of Letters Patent No.

To all whom it may concern:

Be it known that I, I. P. TICE, of Baltimore, in the county of Baltimore and State of Maryland, have invented a new and useful Improvement in Rotary Cutter-Heads; and I do hereby declare that the following is a full, clear, and exact description of the same, 'reference being had to the annexed drawings, making a partv of this specification, in which- Figure l is an elevation of my invention. Fig. 2 is a vertical section of the same, Fig. 3 is a plan or top view of the same.

Similar letters of reference indicate corresponding parts in the several figures.

This invention consists in having the cutters placed in such relation with a cylinder or a segment of a cylinder as to prevent any undue action of the cutters on the stuff so that the former cannot follow the grain of the wood and draw it suddenly along thereby spoiling the work and endangering the hands of the o erator.

The invention a so has for its object a perfect operation of the cutters on the stuli' so that the latter will be cut smooth and with a good finish and the cutters allowed to be adjusted on their arbor as the nature ofthe work may require, the invention serving as a guide for the setting thereof. 1

To enable those skilled in the art to fully understand and construct my invention I will proceed to describe it.

A, represents an arbor to which cutters B, B, are attached. These cutters may be of any proper form according to the character of the work, to be performed by them.

On the arbor A, directly above the cutters B, B, a hollow cylinder C, is placed. This cylinder has a partition a, at its center and one portion b, of the cylinder is larger in diameter than the other portion o, as shown clearly in Figs. l and 2. In these figures the lower part of the cylinder is the larger part and said part extends down between the cutters B, B, a suliicient distance, slots d, being made in the side of the cylinder to receive the top parts of the cutters, the edges e, e, of the cutters being` allowed to project out from the periphery of the cylinder a requisite distance corresponding to the thickness of the shaving to be cut. The cylinder C, may extend down a greater or less distance between the cutters but grain and also to a tendency of the cutters" 26,383, dated December i ciently to form a bearing for the st/uff?? `1 to be operated on. The partitionlw, ofthe cylinder C, rests on a. collar f, secured to l 1 the arbor and thisfcollarmaybe madea justable by means of a screw threadxon the arbor and an internal screwthread. iin; t collar, or` a series ofgwashers may be used; j order that the cylindervmay bel adjusted higher or lower. `Onthe arbor A, and abovel the partition a, a nut D, isl ttedbyuwhich* the cylinder `may be` firm-lyV secured down `lon@ j the the collar or on the washers "placed thereon. j l From the above description `it will be seen that `the stuff to be operated `on cannotl` be unduly acted upon bythe cutters B, By for the periphe of the cylinder C, serves as a bearing sur ace for the stuff j. and the cutters are prevented from gouging intofthel stuff a contingency dueto an irregular to follow the grain when cutting a ainst it. Cutter heads that are not `provi ed with any guard or shield frequently at `certa parts of the stuff favorable for sucha j result penetrate the` stui' so asfto` `draw n it rapidly and suddenly along andi` .thek t hands of the operatorfare not unfrequentlyf maimed thereby. j ,t i l.

The cylinder C, s formedfwith two` dif-f` ferent sized diameters in` order that the same i cylinder may be appliedto cutters of difer ent lengths, that is to say, those that vary` materially, more than `can be compensated: for by the adjustment allowed forthem byf` their attachmentto the arbor.` i

In order to apply the smaller portion c, of the cylinder to the cutters7 the cylinderl is merely inverted on the arbor. Aseries of these cylinders of various sizes `corr spending to the length of thecuttersmaybe kept on hand ready `for use. 'j I am aware that a rotary `cutter head has.;` been provided withalguard or shieldincr-` j der to efect the same purposetas the within j, 1 described invention, see patent granted to Lewis M. Berry bearing date July` 22, 1856, but in the latter case the cutters are tted in` a solid head, or segments are flttedbetween, the cutters so` as tovirtually form asolid` head conforming inversely` to the shapeof the pattern to becut on the stuii'fl This device admits of no variety of cutters being` z used with the same guard or shield, a,in other words each cutter has necessarily a guard or j l, shield made expressly `forit and the` expense f `between the cutters in order to form the bearing for the stuit as previously de-` scribed.

A complete cylinder C, as herein described would be preferable, but a segment of a cylinder would answer, a bearing surface being obtained near the cutting edge e, of each cutter as shown by the blue lines in Figs. l and 3. I therefore do not confine myself to a cylinder as a segment or section thereof .would answer although not as perfectly as an entire cylinder and these segments may have a comparatively small bearing surface like a narrow vertical line, but in the latter case the work performed by the cutters would not be so smooth andquite inferior as regards finish compared with the work performed by the cutters provided with the entire cylinder.

I do not claim broadly the employment or use of a guard o-r shield applied to a rotary cutter head irrespective of the arrangement herein shown, but,

I do claim as new and desire to secure by Letters Patent- The employment or use of a cylinder C, or any segment. or section thereof applied to rotary cutters to operate substantially as and for the purpose set forth.

I. P. TICE.

Witnesses:

J; W. CooMBs, R. S. SPENCER. 

